We are very pleased to be a premier tuner for the 3.6 Direct Injection LFX V6 found in your 2015 to present Colorado and Canyon V6 pickups. The benefits of an Overkill tune are straight forward: More power, more instantaneous, improved transmission performance, and proper support for your additional modifications. Best yet, with an Overkill tune, retuning support in future is included, so we'll help you each step of the way forward as you add something new. Whether you're a serious car enthusiast, or you're just looking to make your 300 Horsepower truck FEEL like a 300 horsepower truck, Overkill is here to help achieve your goals!

What you'll notice:
  • Horsepower and torque gains of 15-30 on 91 octane and 10-15 on 87 octane anticipated
  • Stronger low end torque, less peaky feeling to the power delivery
  • Improved response from the throttle pedal, NO NEED FOR EXTERNAL THROTTLE BOOSTERS!
  • Increased fuel mileage possible, 1-3 MPG gains possible and will depend on your driving style
  • Fully rewritten transmission shift points will downshift with less throttle input, upshift at better engine rpms, reduce bogging around town, and improve how the vehicle feels by feeling lighter and easier to drive. This is one of the most common complaints on the new Colorado/Canyon, you'll love an overkill tuned transmission!
  • Tuning For All Aftermarket Intakes including with larger MAF sensors
  • Tuning for Exhaust Upgrades including high flow cat converters, P0420/P0430 removed
  • Tuning for Rear Differential Swaps, including auto trans retuning and speedometer
  • Speed limiter removed, Rev Limiter in Park raised
  • Tuning available for Supecharger Kits!
  • No Charge Retuning For Future Modifications for as long as you own your truck


What you'll get with your purchase:
  • An Autocal handheld tuning device, with software on a USB drive
  • Overkill 91/93 octane tune
  • Overkill 87 octane tune
  • Overkill E85 Flex Fuel tuning contained in each tune
  • Tuning support for datalogging and custom revisions
  • Tuning support for new mods as you add them, for as long as you own the vehicle


Why get an Overkill tune versus the competition?
  • Specialized in the LFX motor. From revised cam phasing, fully reconstructing spark timing tables and fully revised throttle calibration, an Overkill tune is more comprehensive than what you'll get at your local dyno shop. Our tuning includes comprehensive peformance calibrations on both regular and premium gasoline, and on E85 Ethanol; our competitors commonly don't offer 87 octane or E85 performance tuning.
  • Datalogging. You'll get your Overkill tunes but it doesn't stop there. You can scan with our handheld while driving and send that data for review and tune updates, to get a tune that's more customized for your vehicle. Our competitors offer this service for extra fees or not at all
  • Support for your mods. Not only are we the only company with an E85 Flex Fuel conversion kit or a larger 80mm throttle body kit, but we also have the right tuning to ensure you get the most from them! Our competitors typically offer a preset tune meant for 100% factory unmodified vehicles only
  • Retunes. With our handheld, retuning for your future modifications is complimentary and easy to provide



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Autocal Handheld: The best way for us to provide Colorado/Canyon LFX tuning for you is through our Autocal handheld system. The Autocal handheld allows you to take the handheld to the vehicle, read the factory file, upload our Overkill tunes and provide scan data, with no laptop required. Return to stock calibration whenever you want, apply updates and retunes easily through email with us and Overkill retuning is available at no charge for as long as you own your truck.




Overkill is also a Diablosport custom tuner. Already have an Intune or Trinity from Diablosport? Upgrade it with Overkill tuning! You'll receive our Overkill tunes and tuning support for as long as you own the truck. Overkill tunes get loaded to the handheld and can be flashed just like the Diablo tune. 87 octane, 91/93 octane and E85 tuning all included in the purchase.

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The only larger throttle body for the 2012+ LFX 3.6 is available here at Overkill. The factory throttle body is 72mm. Our 80mm throttle body solution dwarfs the stock unit and bolts directly to your Colorado/Canyon intake manifold which already has a 79.5mm inlet to take full advantage of this larger throttle body! One of the best upgrades you can do beyond our tune, this throttle body setup will improve horsepower at a dyno tested 11+ wheel horsepower, improves throttle response (particularly with Overkill tuning) and changes the intake note of the V6 to a deeper growl at heavy throttle.

Throttle body is a brand new unit, comes with an aluminum adapter plate, stainless steel bolts and some parts to assist installation.

Tip: This throttle body has a 3.5" clamping area, compared to the factory throttle body of 3". Ensure you have a solution available before installing the throttle body! Requires no tuning but works even better with Overkill tuning (if you're an Overkill tune user, you get a no charge revision for your Autocal).









First and only to market! Unlike most other LFX engines, the Colorado/Canyon isn't equipped for flex fuel operation, which is the ability to fill up and run E85 ethanol at any time. However for those enthusiasts who know the performance benefits E85 Ethanol can provide, Overkill offers a flex fuel conversion kit for your C/C truck.

Kit includes a genuine GM flex fuel sensor from another application along with our exclusive wiring harness that requires no cutting/splicing, just a plug and play connection and add one pin to the factory computer wiring connector. High quality AN fittings and hose plumb the sensor into fuel supply in the engine compartment complete the kit.

Tip: Tuning is required. We have our own specific E85 performance calibration. If you have Overkill tuning, we'll provide the necessary tuning for flex fuel activation with our E85 performance calibration at no charge. We've been flex fuel converting Chevrolet Camaro and GMC Acadia platforms since 2014 and tuning flex fuel LFX 3.6s since their introduction in 2012.